vendor address:

All MACs starting with 44-6D-57 belong to the owner Liteon Technology Corporation in 4f, 90, Chien 1 Road, Chungho Taipei Taiwan 23585 Taiwan, Province Of China. You will find support for your hardware on the manufacturer webpage {here|there|http://www.liteon.com/index.aspx?lang=en}.
This registered array of 34 blocks can identify a maximum of 570.425.344 devices.